CN115833486B - In-tank direct-cooling generator based on heat pipe cooling - Google Patents
In-tank direct-cooling generator based on heat pipe cooling Download PDFInfo
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- CN115833486B CN115833486B CN202310113714.2A CN202310113714A CN115833486B CN 115833486 B CN115833486 B CN 115833486B CN 202310113714 A CN202310113714 A CN 202310113714A CN 115833486 B CN115833486 B CN 115833486B
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Abstract
The invention discloses an in-groove direct-cooling generator based on heat pipe cooling, which comprises a bearing mechanism, wherein the bearing mechanism comprises a front end cover, a shell and a rear end cover, the front end cover is fixed on one side of the shell, the rear end cover component is fixed on the other side of the shell, the cooling mechanism is fixed on the rear end cover, the heat conduction mechanism comprises heat pipes, a plurality of the heat pipes are uniformly arranged along the circumference of an inner stator iron core, and the inner cavity mechanism comprises an outer rotor component, an inner stator component and an inner stator bracket, wherein the outer rotor component is positioned on the inner side of the shell and is provided with a gap. According to the structural characteristics of the stator tooth grooves, a heat pipe with a flat pipe shell at the evaporation section and a circular pipe shell at the heat insulation section and the condensation section are reasonably designed, cooling water is pumped into a cavity water channel surrounded by the cooling mechanism to take away heat transferred to the condensation section by the heat conduction mechanism, and a forced water cooling mode is combined with heat transfer of the heat pipe, so that the cooling effect is more remarkable than that of the prior art.
Description
Technical Field
The invention relates to the field of generators, in particular to an in-tank direct-cooling generator based on heat pipe cooling.
Background
The heat pipe technology has been widely used in aerospace, military industry, radiator manufacturing and other industries since 1963 is born. The heat pipe fully utilizes the conduction principle and the rapid heat transfer property of the phase change medium, and the heat of the heating object is rapidly transferred to the outside of the heat source through the heat pipe, so that the heat conduction capacity of the heat pipe exceeds the heat conduction capacity of any known metal. A typical heat pipe consists of a tube shell, a wick and a phase change medium, the tube is pumped to 1.3 (10 -1 ～10 -4 ) And filling a proper amount of working liquid after the negative pressure of Pa, so that the liquid-absorbing core capillary porous material which is tightly attached to the inner wall of the pipe is filled with the liquid and then sealed. One end of the heat pipe is an evaporation section (heating section), the other end is a condensation section (cooling section), and a heat insulation section can be arranged between the two sections according to application requirements. When the evaporation section of the heat pipe is heated, the working liquid in the pipe core is heated and evaporated, and heat is taken away, the heat is the evaporation latent heat of the working liquid, the steam flows from the central channel to the condensation section of the heat pipe, is condensed into liquid, and simultaneously releases the latent heat, and the liquid flows back to the evaporation section under the action of capillary force. So that the circulation is not completed, and a large amount of heat is addedThe hot section passes to the cooling section. In the prior art, the case of applying the heat pipe technology to cooling and radiating of the motor is mainly divided into forced air cooling based on the heat pipe and forced water cooling based on the heat pipe. Forced air cooling effect based on the heat pipe is good, but the motor structure is large in size due to air cooling requirement, so that miniaturization is not facilitated; meanwhile, the arrangement position of the heat pipe is not ideal, basically the heat pipe is arranged on the shell or the iron core yoke part, and the heat pipe is not directly arranged in the iron core groove with relatively concentrated heat or directly takes away the heat generated by the main heat source in the middle of the groove, so the cooling effect is not very obvious. The forced water cooling effect based on the heat pipe is better, the motor shell and the independent water cooling circulation system are connected by the heat pipe, the position of the heat pipe is not positioned at the main heat source but on the shell, and the forced water cooling system and the motor main body are separated, so that the arrangement is that the cooling effect is better than the forced air cooling effect, but the conduction heat dissipation is not the most direct and the most effective; meanwhile, the forced water cooling system is separated from the motor main body, so that the development trend of high integration of the current motor design is not met, and unnecessary design and installation space are increased.
Therefore, it is necessary to provide an in-tank direct-cooling generator based on heat pipe cooling, which is used for directly cooling the inside of a motor to generate a main heat source in a stator tank or in the middle of the tank, so as to solve the most fundamental cooling and heat dissipation problem of the motor.
Disclosure of Invention
This section is intended to summarize some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, which may be simplified or omitted from the present section and description abstract and title of the application to avoid obscuring the objects of this section, description abstract and title, and which is not intended to limit the scope of this invention.
The present invention has been made in view of the above and/or problems occurring in the prior art.
Therefore, the technical problem to be solved by the invention is that the heat in the stator slot is most concentrated and the heat dissipation resistance is most bad, and the problem that a large amount of heat is accumulated at the stator part cannot be fundamentally and directly solved in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: an in-tank direct-cooling generator based on heat pipe cooling comprises,
the bearing mechanism comprises a front end cover, a shell and a rear end cover, wherein the front end cover is fixed on one side of the shell, and the rear end cover assembly is fixed on the other side of the shell; the method comprises the steps of,
the cooling mechanism is fixed on the rear end cover and comprises a water channel pressing plate, a cover plate, a water nozzle, a sealing column pressing ring and a water channel baffle plate, wherein the water channel pressing plate is fixedly connected with the rear end cover, the cover plate is fixed at one end of the water channel pressing plate far away from the rear end cover, the sealing column pressing ring and the water channel baffle plate are arranged between the rear end cover and the water channel pressing plate, and the water nozzle is fixed on the rear end cover; the method comprises the steps of,
the heat conduction mechanism comprises heat pipes, and a plurality of the heat pipes are uniformly arranged along the circumference of the inner stator iron core; the method comprises the steps of,
the inner cavity mechanism comprises an outer rotor assembly, an inner stator assembly and an inner stator bracket, wherein the outer rotor assembly is positioned on the inner side of the shell and is provided with a gap, the inner stator assembly is coaxially positioned on the inner side of the outer rotor assembly and is provided with a gap, the inner stator assembly is fixedly connected to the outer side of the inner stator bracket, and the inner stator bracket is fixedly connected to a cylindrical shell of which the rear end cover is positioned in the inner cavity of the motor.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: an annular water channel is formed in one side, far away from the inner cavity mechanism, of the rear end cover, the annular water channel comprises an inner ring and an outer ring, and a plurality of conical holes are uniformly formed between the inner ring and the outer ring along the circumferential direction.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the rear end cover is also provided with a water inlet and a water outlet, and the water inlet and the water outlet are arranged on the outer side of the outer ring.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the water channel pressing plate is arranged on the end surfaces of the inner ring and the outer ring, far away from the inner cavity mechanism in a sealing way, and a D-shaped cavity of the water channel pressing plate is used for winding wiring;
the cover plate is connected with the end face, far away from the annular water channel, of the D-shaped cavity;
the two water nozzles are arranged on the outer side of the outer ring and are respectively connected with the two round holes of the water inlet and the water outlet in a sealing mode.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the sealing column is conical, a round hole is formed in the axial direction, and the outer side of the sealing column is tightly attached to the inner wall of the conical hole;
the sealing post clamping ring is provided with elliptical holes corresponding to the circular holes in position, the elliptical holes are uniformly distributed along the circumferential direction of the sealing post clamping ring, the central lines of the elliptical holes in the length direction are all intersected at the center of the sealing post clamping ring, and the sealing post clamping ring is tightly pressed on one side, close to the inner cavity mechanism, of the annular water channel.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the water channel baffle is arranged in the annular water channel and fixedly connected with one side of the annular water channel, which is close to the inner cavity mechanism.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the outer rotor assembly comprises a flywheel disc, an outer rotor bracket, an outer rotor iron core, outer rotor magnetic steel, a magnetic steel compression ring and a rotary transformer, wherein the center of the flywheel disc is connected with an external engine, and the flywheel disc is fixedly connected with one end of the outer rotor bracket;
the outer rotor iron core is arranged on the inner side of the outer rotor bracket;
the outer rotor magnetic steel is arranged on the inner side of the outer rotor iron core;
the magnetic steel compression ring is fixedly connected with the other end of the outer rotor bracket and compresses the outer rotor magnetic steel;
the rotary variable piece is arranged on the convex short shaft at the center of the flywheel disc.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the inner stator assembly comprises an inner stator iron core and a coil winding, the inner stator iron core is fixed on the inner stator support, and the coil winding is wound on the inner stator iron core.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the heat pipe comprises an evaporation section, a heat insulation section and a condensation section, wherein one end of the heat pipe is the evaporation section, the other end of the heat pipe is the condensation section, and the heat insulation section is arranged between the two sections;
the evaporation section is arranged at the symmetrical center surface of the tooth slot of the inner stator core and is tightly attached to windings wound on adjacent tooth parts in the tooth slot.
As a preferable scheme of the direct-cooled generator in the tank based on heat pipe cooling, the invention comprises the following steps: the evaporation section is a flat pipe body, two parallel surfaces on the outer side of the evaporation section are symmetrically arranged relative to the central surface of the tooth slot, the length direction of the evaporation section is parallel to the axial direction of the inner stator core, the evaporation section passes through an end winding on one side of the inner stator core to reach an end winding on the other side, and the evaporation section is positioned in the middle surface of an adjacent tooth winding and is tightly attached to the winding;
the condensing section and the heat insulation section are a section of circular pipe body.
The invention has the beneficial effects that:
1. according to the structural characteristics of the stator tooth grooves, a heat pipe with a flat pipe shell at the evaporation section and a circular pipe shell at the heat insulation section and the condensation section are reasonably designed;
2. according to the position of the heat conduction mechanism on the inner stator assembly, an annular water channel is formed in the rear end cover, and a sealing column compression ring are arranged on the annular water channel. The condensation section of the heat conduction mechanism passes through the sealing column and is arranged in the water channel, and the sealing compression ring tightly presses the sealing column, so that the sealing effect is enhanced, and the water leakage risk is avoided. The cooling mechanism consists of a water channel pressing plate, a water nozzle, a sealing column pressing ring and a water channel baffle. The cooling water is pumped into the cavity water channel surrounded by the cooling mechanism to take away the heat transferred to the condensing section by the heat conducting mechanism, and the forced water cooling mode and the heat transfer of the heat pipe are combined, so that the cooling effect is more remarkable than that of the prior art.
3. The heat pipe cooling mode and the forced water cooling mode adopted in the prior art do not fundamentally solve the heat dissipation and cooling problems of the motor. The direct cooling scheme in the groove is that the heat pipe is directly inserted into the stator groove with the most concentrated heat and the most severe heat dissipation resistance, and a heat pipe structure with good fitting degree, high space utilization rate and quick heat conduction is designed according to the structure of the stator groove, so that the conduction effect is obvious; the rear end cover is provided with a circulating water channel and a heat conducting mechanism which are combined, so that the cooling effect is better. Therefore, compared with the prior art, the cooling system design of the invention has obvious heat dissipation and cooling effects, and fundamentally solves the heat dissipation problem.
4. The adoption of the rear end cover to open the circulating water channel saves the radial dimension of the motor compared with the case, so that the whole structure is more compact and symmetrical. Copper pipe inserts the stator inslot, does not increase the volume of motor inner chamber in spatial structure for the inner space obtains make full use of. Therefore, the water cooling system design of the generator not only fully utilizes the reasonable arrangement of the internal space of the motor, but also reduces the overall diameter of the motor and ensures that the appearance structure is more coordinated and attractive.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the overall structure of a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a cooling mechanism in a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a rear end cover of a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a seal column in a heat pipe cooling-based in-tank direct-cooled generator according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a seal post compression ring in a heat pipe cooling-based in-tank direct-cooling generator according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an outer rotor assembly of an in-tank direct-cooled generator based on heat pipe cooling according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an inner stator assembly in a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an inner stator core in a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a heat pipe in a direct-cooled generator in a tank based on heat pipe cooling according to an embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
In the following detailed description of the embodiments of the present invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the invention is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 10, the present embodiment provides an in-tank direct-cooling generator based on heat pipe cooling, which includes a bearing mechanism 100 including a front end cover 101, a housing 102 and a rear end cover 103, wherein the front end cover 101 is fixed on one side of the housing 102, the rear end cover assembly 103 is fixed on the other side of the housing 102, and,
the cooling mechanism 200, the cooling mechanism 200 is fixed on the rear end cover 103, and comprises a water channel pressing plate 201, a cover plate 202, a water nozzle 203, a sealing column 204, a sealing column pressing ring 205 and a water channel baffle 206, wherein the water channel pressing plate 201 is fixedly connected with the rear end cover 103, the cover plate 202 is fixed at one end of the water channel pressing plate 201 far away from the rear end cover 103, the sealing column 204, the sealing column pressing ring 205 and the water channel baffle 206 are arranged between the rear end cover 103 and the water channel pressing plate 201, the water nozzle 203 is fixed on the rear end cover 103,
the heat conduction mechanism 300 includes heat pipes 301, a plurality of heat pipes 301 are uniformly installed along the circumference of the inner stator core 402a, and,
the inner cavity mechanism 400 comprises an outer rotor assembly 401, an inner stator assembly and an inner stator bracket 403, wherein the outer rotor assembly 401 is positioned on the inner side of the shell 102 and is provided with a gap, the inner stator assembly is coaxially positioned on the inner side of the outer rotor assembly 401 and is provided with a gap, the inner stator assembly is fixedly connected to the outer side of the inner stator bracket 403, and the inner stator bracket 403 is fixedly connected to a cylindrical shell of which the rear end cover 103 is positioned in the inner cavity of the motor.
Specifically, an annular water channel 103a is provided on a side of the rear end cover 103 away from the inner cavity mechanism 400, the annular water channel 103a includes an inner ring 103a-1 and an outer ring 103a-2, and a plurality of tapered holes 103d are uniformly provided between the inner ring 103a-1 and the outer ring 103a-2 along the circumferential direction. The rear end cover 103 is also provided with a water inlet 103b and a water outlet 103c, and the water inlet 103b and the water outlet 103c are arranged on the outer side of the outer ring 103 a-2. The water channel pressing plate 201 is installed on the end surfaces of the inner ring 103a-1 and the outer ring 103a-2 far away from the inner cavity mechanism 400 in a sealing mode, a D-shaped cavity of the water channel pressing plate 201 is used for winding wiring, the cover plate 202 is connected with the end surface of the D-shaped cavity far away from the annular water channel 103a, and two water nozzles 203 are arranged on the outer side of the outer ring 103a-2 and are respectively connected with two round holes of the water inlet 103b and the water outlet 103c in a sealing mode. The sealing column 204 is conical, a round hole 204a is formed in the axial direction, the outer side of the sealing column 204 is tightly attached to the inner wall of the conical hole 103d, elliptical holes 205a corresponding to the round hole 204a are formed in the sealing column compression ring 205, the elliptical holes 205a are uniformly distributed along the circumferential direction of the sealing column compression ring 205, the center lines of the elliptical holes 205a in the length direction are all intersected at the center of the sealing column compression ring 205, and the sealing column compression ring 205 is tightly pressed by the sealing column compression ring 204 and fixedly connected to one side, close to the inner cavity mechanism 400, of the annular water channel 103 a. The water channel baffle 206 is disposed in the annular water channel 103a and fixedly connected to one side of the annular water channel 103a near the inner cavity mechanism 400.
Preferably, the outer rotor assembly 401 comprises a flywheel disc 401a, an outer rotor support 401b, an outer rotor iron core 401c, outer rotor magnetic steel 401d, a magnetic steel pressing ring 401e and a rotary member 401f, wherein the center position of the flywheel disc 401a is connected with the external engine 500, the flywheel disc 401a is fixedly connected with one end of the outer rotor support 401b, the outer rotor iron core 401c is arranged on the inner side of the outer rotor support 401b, the outer rotor magnetic steel 401d is arranged on the inner side of the outer rotor iron core 401c, the magnetic steel pressing ring 401e is fixedly connected with the other end of the outer rotor support 401b and tightly presses the outer rotor magnetic steel 401d, and the rotary member 401f is arranged on an outer convex short shaft at the center position of the flywheel disc 401 a. The inner stator assembly includes an inner stator core 402a and a coil winding 402b, the inner stator core 402a being fixed on an inner stator bracket 403, the coil winding 402b being wound on the inner stator core 402 a. The heat pipe 301 comprises an evaporation section 301a, an insulation section 301b and a condensation section 301c, one end of the heat pipe 301 is the evaporation section 301a, the other end is the condensation section 301c, the insulation section 301b is arranged between the two sections, the evaporation section 301a is arranged at the symmetrical center surface of a tooth slot of the inner stator core 402a, and the evaporation section 301a is tightly attached to windings wound in adjacent tooth sections in the tooth slot. The evaporation section 301a is a flat pipe body, two parallel surfaces on the outer side of the evaporation section 301a are symmetrically arranged relative to the central surface of a tooth slot, the length direction of the evaporation section 301a is parallel to the axial direction of the inner stator core 402a, the evaporation section 301a passes through an end winding on one side of the inner stator core 402a to reach an end winding on the other side, the evaporation section 301a is positioned in the middle surface of an adjacent tooth winding and is tightly attached to the winding, and the condensation section 301c and the heat insulation section 301b are a circular pipe body.
Preferably, the evaporation section 301a is located on the center surface of the tooth space, and a plurality of heat pipes 301 can be placed on the center surface, and the number of the heat pipes 301 is determined according to the size of the tooth space and the size of the heat pipes 301. The evaporation section 301a is specifically positioned in the tooth space: the middle of the adjacent stator tooth windings passes through the end winding on one side to the end winding on the other side; specific heat absorption range of the evaporation section 301 a: the bottom of the tooth slot is up to the top; and the end windings on one side are positioned between the end windings on the other side and are positioned in the middle of the adjacent stator tooth windings. The evaporation section 301a is flat for the purpose of: firstly, the contact area between the winding and the winding is increased, and the heat absorption and evaporation are fully carried out; secondly, the degree of fit with the winding is increased, so that the winding is convenient to be tightly fit; thirdly, the space between windings is reduced, and the space utilization rate is increased.
The purpose of the insulation section 301b and the condensation section 301c being circular: the degree of fit is increased, and the sealing effect between the heat pipe 301 and the sealing post 204 is facilitated. The heat conducting mechanism 300 is composed of a plurality of heat pipes uniformly distributed along the circumferential direction of the stator core. Because heat is mainly concentrated at the stator part: the heat conduction mechanism 300 can quickly and efficiently bring the heat of the main heat source from the evaporation section to the condensation section, thereby fundamentally and most directly solving the problem of mass heat accumulation of the stator part.
The interaction between the sealing column 204 and the water channel conical hole 103d and the heat pipe circular condensation section 301c are that the sealing column compression ring 205 is tightly pressed against the sealing column 204, the outer side of the conical sealing column 204 is tightly pressed against the water channel conical hole 103d, and the round hole 204a is tightly pressed against the heat pipe circular condensation section 301c, so that the risk of water leakage can be avoided.
Example 2
Referring to fig. 1 to 10, the present embodiment provides an in-tank direct-cooling generator based on heat pipe cooling, which includes a front end cover 101, a housing 102, a rear end cover 103, and an inner cavity mechanism 400. A front end cover 101, the front end cover 101 being provided at one side of the housing 102; a housing 102, the housing 102 being disposed between the front end cover 101 and the rear end cover 103; a rear end cover 103, the rear end cover 103 being provided with a cooling mechanism 200; the inner cavity mechanism 400, the inner cavity mechanism 400 comprises an outer rotor assembly 401, an inner stator assembly and an inner stator bracket 403, and the inner stator assembly is provided with a heat conduction mechanism 300; the condensation section 301c of the heat conducting mechanism 300 is arranged inside the cooling mechanism 200 and cooperates to form a heat conducting cooling system.
Further, the cooling mechanism 200 includes a waterway pressing plate 201, a cover plate 202, a water nozzle 203, a seal column 204, a seal column pressing ring 205, and a waterway baffle 206. An annular water channel 103a is formed in one side, far away from the inner cavity mechanism 400, of the rear end cover 103, a plurality of conical holes 103d are uniformly formed between an inner ring 103a-1 and an outer ring 103a-2 of the annular water channel 103a along the circumferential direction, and two round holes are formed in the outer side of the outer ring 103 a-2: a water inlet 103b and a water outlet 103c; the water channel pressing plate 201 is arranged on the end surfaces of the inner ring 103a-1 and the outer ring 103a-2, which are far away from the inner cavity mechanism 400 in a sealing way, and the D-shaped cavity of the water channel pressing plate 201 is used for winding wires; the cover plate 202 is connected with the end surface of the D-shaped cavity, which is far away from the annular water channel 103 a; two water nozzles 203 are arranged outside the outer ring 103a-2 and are respectively connected with two round holes of the water inlet 103b and the water outlet 103c in a sealing way; the outer shape of the sealing column 204 is conical, two round holes 204a (or a plurality of round holes) are formed in the axial direction, and the outer side of the sealing column 204 is tightly attached to the inner wall of the conical hole 103 d; elliptical holes 205a corresponding to the positions of the round holes 204a of the sealing column 204 are formed in the sealing column pressing ring 205, the elliptical holes 205a are uniformly distributed along the circumferential direction of the sealing column pressing ring 205, the center lines of the elliptical holes 205a in the length direction are intersected at the center of the sealing column pressing ring 205, and the sealing column pressing ring 205 is tightly pressed on the sealing column 204 and is detachably and fixedly connected to one side, close to the inner cavity mechanism 400, of the annular water channel 103 a; the water channel baffle 206 is disposed in the annular water channel 103a, and is fixedly connected to one side of the annular water channel 103a near the inner cavity mechanism 400, for separating a channel between the water inlet 103b and the water outlet 103c in the water channel, so as to form a circulating water channel. In the working state, external circulating water is pumped into cooling water with a certain temperature from the water inlet 103b under the pumping action, and the cooling water flows through the annular water channel 103a and is finally pumped out from the water outlet 103 c.
The interaction between the sealing column 204 and the water channel conical hole 103d and the heat pipe circular condensation section 301c are that the sealing column compression ring 205 is tightly pressed against the sealing column 204, the outer side of the conical sealing column 204 is tightly pressed against the water channel conical hole 103d, and the round hole 204a is tightly pressed against the heat pipe circular condensation section 301c, so that the risk of water leakage can be avoided. The number of round holes 204a formed in the sealing post 204 is determined according to the number of heat pipes 301.
The rear end cover 103 is provided with a cooling mechanism 200, and the cooling mechanism 200 comprises a water channel pressing plate 201, a water nozzle 203, a sealing column 204, a sealing column pressing ring 205 and a water channel baffle 206. The cavity channel formed by the cooling mechanism 200 is used for pumping circulating water for cooling and radiating during operation.
Further, the inner chamber mechanism 400 includes an outer rotor assembly 401, an inner stator assembly, and an inner stator bracket 403. Outer rotor assembly 401 is positioned inside housing 102 with a gap therebetween; the inner stator assembly is coaxially positioned inside the outer rotor assembly 401 with a gap therebetween; the inner stator assembly is fixedly connected to the outside of the inner stator bracket 403; the inner stator bracket 403 is fixedly connected to a cylindrical housing of the rear end cap 103 located in the inner cavity of the motor.
The outer rotor assembly 401 includes a flywheel disc 401a, an outer rotor support 401b, an outer rotor core 401c, outer rotor magnetic steel 401d, a magnetic steel compression ring 401e and a rotary member 401f. The center position of the flywheel disc 401a is connected with the external engine 500, and the outer ring of the flywheel disc 401a is fixedly connected to one end of the outer rotor bracket 401 b; an outer rotor core 401c is arranged on the inner side of the outer rotor bracket 401 b; an outer rotor magnetic steel 401d is arranged on the inner side of the outer rotor iron core 401c; a magnetic steel pressing ring 401e is fixed to the other end of the outer rotor support 401b and presses the outer rotor magnetic steel 401d; the spin-change member 401f is disposed on the convex stub shaft at the center of the flywheel disk 401 a.
The inner stator assembly includes an inner stator core 402a, a coil winding 402b, and a heat conduction mechanism 300. The inner stator core 402a is fixed to the inner stator bracket 403, the coil winding 402b is wound on the inner stator core 402a, and the evaporation section 301a of the heat conduction mechanism 300 is disposed at the symmetrical center plane of the tooth slot of the inner stator core 402a, and is tightly attached to the winding wound on the adjacent tooth part in the tooth slot.
The heat conduction mechanism 300 comprises a plurality of heat pipes 301 uniformly distributed along the circumference of the inner stator core, wherein the heat pipes 301 are self-made heat pipes, and the materials used are not limited. The heat pipe 301 includes a tube housing, a wick, and a phase change medium. The liquid absorbing core is distributed in the whole length direction and clings to the pipe wall of the pipe shell, the central position of the pipe shell is a cavity, and the phase change medium fills the whole liquid absorbing core. One end of the heat pipe is an evaporation section 301a (heating section), the other end is a condensation section 301c (cooling section), and an insulation section 301b is arranged between the two sections. When the evaporation section 301a of the heat pipe is heated, the working liquid in the pipe core is heated and evaporated, and takes away heat, the heat is the evaporation latent heat of the working liquid, the vapor flows from the central channel to the condensation section 301c of the heat pipe, is condensed into liquid, and simultaneously releases the latent heat, and the liquid flows back to the evaporation section 301a under the action of capillary force. This cycle is not complete, and a large amount of heat is efficiently transferred from the heating section to the cooling section. The external shape of the heat pipe 301 employed in the present invention is specially treated. The evaporation section 301a is a flat tube shell, two parallel surfaces on the outer side of the tube shell are symmetrically arranged about the central surface of the tooth slot, the length direction of the tube shell is parallel to the axial direction of the inner stator core 402a, the tube shell passes through an end winding on one side of the inner stator core 402a to reach an end winding on the other side, and the whole evaporation section 301a is positioned in the middle surface of an adjacent tooth winding and is clung to the winding; the condensing section 301c and the heat insulating section 301b are a circular tube shell. Each spline can be placed with two (or several) heat pipes 301 side by side, the number of heat pipes 301 being determined by the spline size and the heat pipe 301 size. The condensing section 301c is inserted into the water channel of the cooling mechanism 200 through the hole on the sealing post 204; the insulating section 301b is interposed between the end windings and the seal post to facilitate vapor communication and condensate wicking. The evaporation section 301a is flat for the purpose of: firstly, the contact area between the winding and the winding is increased, and the heat absorption and evaporation are fully carried out; secondly, the degree of fit with the winding is increased, so that the winding is convenient to be tightly fit; thirdly, the space between windings is reduced, and the space utilization rate is increased. The evaporation section 301a of the heat conduction mechanism 300 penetrates through the whole groove or the middle of the groove, and absorbs heat in the range: the bottom of the tooth slot is up to the top; and the end windings on one side are positioned between the end windings on the other side and are positioned in the middle of the adjacent stator tooth windings.
Further, the cooling system includes a heat conduction mechanism 300 and a cooling mechanism 200. The evaporation section 301a of the heat conduction mechanism 300 absorbs heat generated in the whole groove or directly in the middle of the groove, the phase-change medium evaporates to form steam, the steam flows from the central channel to the condensation section 301c of the heat pipe under the action of air pressure, circulating water in the cooling mechanism 200 performs the convection heat exchange effect on the condensation section 301c, so that the steam is condensed into liquid in the condensation section 301c, and the liquid flows to the evaporation section 301a under the action of capillary force of the liquid absorption core, so that the circulation is not completed.
Example 3
Referring to fig. 1 to 10, the present embodiment provides a direct-cooling generator in a tank based on heat pipe cooling, and along with rapid development and demand change of modern technologies, the development trend of the permanent magnet synchronous generator will show characteristics of high power density, high efficiency, high torque density, and the like. The high power density means smaller volume and more compact structure, so that the same heat is more difficult to dissipate through the smaller volume structure, and the increased heating value is necessary to solve the cooling problem.
The heating of the permanent magnet synchronous generator is caused by various losses during the operation of the motor. The loss of the permanent magnet synchronous generator mainly comprises the following steps: copper loss of the stator, core loss of the stator and the rotor, windage loss of the rotor, friction loss of the bearing and stray loss. The stator copper loss is loss generated by the stator winding resistance, and the stator copper loss accounts for about 65% of the total loss; the iron loss of the motor is mainly concentrated on the stator side, the iron loss on the stator side accounts for more than 95% of the total iron loss, and a large amount of loss exists in the stator part. Therefore, the stator part of the permanent magnet synchronous generator is the most serious part of the motor. In order to ensure the long-term efficient and stable operation of the motor, the temperature of the motor must be controlled within a reasonable range. The common cooling modes mainly comprise natural cooling, forced air cooling and forced water cooling, wherein the cooling effect of the forced water cooling is optimal. Forced water cooling generally leads circulating water into a water channel of a motor shell, and takes away part of heat generated by the motor in a convection heat exchange mode, so that the motor cooling effect is realized. Because the stator winding, the iron core, the shell and the end cover of the motor are not in direct contact, an air gap exists around the motor, the heat transfer coefficient of air is very low, the thermal resistance is very large, the heat dissipation is difficult, the heat is transferred from the stator support which is relatively easy to conduct heat to the shell or the end cover, but the heat transfer coefficient between materials is limited, and finally, the phenomenon that the temperature of the shell is not high and the inside of the motor, especially the temperature of the stator side is very high, is formed, so that the pure forced water cooling does not directly cool from a main heat source, but indirectly cool, the heat conduction and dissipation capacity is limited, and the heat accumulation is easy to occur in the inside of the motor. By adopting a conventional cooling mode, the heat dissipation and thermal resistance of the conductor in the slot or in the middle of the slot at the side of the stator are maximum, and local high temperature is easy to form. As motor requirements increase, cooling problems are highlighted. The common enameled wire is generally limited to be below 180 ℃, the demagnetizing temperature of the permanent magnet is between 80 ℃ and 180 ℃, and the specified values of different types of permanent magnets are different. This determines that the high requirements of the motor can only be met by a more efficient heat dissipation.
The heat pipe technology has been widely used in aerospace, military industry, radiator manufacturing and other industries since 1963 is born. The heat pipe fully utilizes the conduction principle and the rapid heat transfer property of the phase change medium, and the heat of the heating object is rapidly transferred to the outside of the heat source through the heat pipe, so that the heat conduction capacity of the heat pipe exceeds the heat conduction capacity of any known metal. A typical heat pipe consists of a tube shell, a wick and a phase change medium, the tube is pumped to 1.3 (10 -1 ～10 -4 ) And filling a proper amount of working liquid after the negative pressure of Pa, so that the liquid-absorbing core capillary porous material which is tightly attached to the inner wall of the pipe is filled with the liquid and then sealed. One end of the heat pipe is an evaporation section (heating section), the other end is a condensation section (cooling section), and a heat insulation section can be arranged between the two sections according to application requirements. When the evaporation section of the heat pipe is heated, the working liquid in the pipe core is heated and evaporated, and heat is taken away, the heat is the evaporation latent heat of the working liquid, the steam flows from the central channel to the condensation section of the heat pipe, is condensed into liquid, and simultaneously releases the latent heat, and the liquid flows back to the evaporation section under the action of capillary force. This cycle is not complete, and a large amount of heat is transferred from the heating section to the cooling section. In the prior art, the case of applying the heat pipe technology to cooling and radiating of the motor is mainly divided into forced air cooling based on the heat pipe and forced water cooling based on the heat pipe. Forced air cooling effect based on heat pipes is good, but motor is caused by air cooling requirementThe structure is large in volume, which is not beneficial to miniaturization; meanwhile, the arrangement position of the heat pipe is not ideal, basically the heat pipe is arranged on the shell or the iron core yoke part, and the heat pipe is not directly arranged in the iron core groove with relatively concentrated heat or directly takes away the heat generated by the main heat source in the middle of the groove, so the cooling effect is not very obvious. The forced water cooling effect based on the heat pipe is better, the motor shell and the independent water cooling circulation system are connected by the heat pipe, the position of the heat pipe is not positioned at the main heat source but on the shell, and the forced water cooling system and the motor main body are separated, so that the arrangement is that the cooling effect is better than the forced air cooling effect, but the conduction heat dissipation is not the most direct and the most effective; meanwhile, the forced water cooling system is separated from the motor main body, so that the development trend of high integration of the current motor design is not met, and unnecessary design and installation space are increased.
Therefore, it is necessary to provide an in-tank direct-cooling generator based on heat pipe cooling, which is used for directly cooling the inside of a motor to generate a main heat source in a stator tank or in the middle of the tank, so as to solve the most fundamental cooling and heat dissipation problem of the motor.
Working principle: the external motor 500 rotates to drive the outer rotor assembly 401 to rotate, and the magnetic field generated by the permanent magnet of the outer rotor assembly 401 continuously cuts the coil winding 402b of the inner stator assembly, so that electromotive force is generated, and loop current is formed by the electromotive force in a closed state of the coil winding 402 b. In the process of generating electricity by a generator, the windings generate heat due to resistance to form copper loss, and the iron cores generate heat due to eddy current to form iron core loss, so the heat is generally mainly concentrated in tooth grooves or in the middle of the grooves and at the end winding positions of the inner stator core. The evaporation section 301a of the heat conduction assembly penetrates through the whole groove and is located between the end windings at two sides, so that the range of heat conduction can be guaranteed to the greatest extent, and the heat of the main heat source is continuously transferred to the condensation section 301c under the action of the heat pipe 301. The cooling mechanism 200 pumps cooling water with a certain temperature from the water inlet under the pumping action, then the cooling water flows through the condensation sections 301c uniformly distributed in the circumferential direction in the circulating water channel to perform the heat convection action, thereby taking away heat, finally the water with heat is pumped out from the water outlet 103c, the water is brought to the outside for cooling, and the cooled water is pumped in from the water inlet 103 b. Such a cycle is not complete. Because the cooling system is used for cooling the part which is the inner stator part with the most serious heat generation, the cooling effect is the most obvious and the most direct.
It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (3)
1. An in-tank direct-cooling generator based on heat pipe cooling, which is characterized in that: comprising the steps of (a) a step of,
the bearing mechanism (100) comprises a front end cover (101), a shell (102) and a rear end cover (103), wherein the front end cover (101) is fixed on one side of the shell (102), and the rear end cover (103) is fixed on the other side of the shell (102);
an annular water channel (103 a) is formed in one side, far away from the inner cavity mechanism (400), of the rear end cover (103), the annular water channel (103 a) comprises an inner ring (103 a-1) and an outer ring (103 a-2), and a plurality of conical holes (103 d) are uniformly formed between the inner ring (103 a-1) and the outer ring (103 a-2) along the circumferential direction; the method comprises the steps of,
the cooling mechanism (200) is fixed on the rear end cover (103), and comprises a water channel pressing plate (201), a cover plate (202), a water nozzle (203), a sealing column (204), a sealing column pressing ring (205) and a water channel baffle plate (206), wherein the water channel pressing plate (201) is fixedly connected with the rear end cover (103), the cover plate (202) is fixed at one end, far away from the rear end cover (103), of the water channel pressing plate (201), the sealing column (204), the sealing column pressing ring (205) and the water channel baffle plate (206) are arranged between the rear end cover (103) and the water channel pressing plate (201), and the water nozzle (203) is fixed on the rear end cover (103);
the water channel pressing plate (201) is arranged on the end surfaces of the inner ring (103 a-1) and the outer ring (103 a-2) far away from the inner cavity mechanism (400) in a sealing mode, and a D-shaped cavity of the water channel pressing plate (201) is used for winding wiring;
the cover plate (202) is connected with the end face, far away from the annular water channel (103 a), of the D-shaped cavity;
the two water nozzles (203) are arranged outside the outer ring (103 a-2) and are respectively connected with the water inlet (103 b) and the water outlet (103 c);
the sealing column (204) is conical, a round hole (204 a) is formed in the axial direction, and the outer side of the sealing column (204) is tightly attached to the inner wall of the conical hole (103 d);
elliptical holes (205 a) corresponding to the circular holes (204 a) are formed in the sealing column pressing ring (205), the elliptical holes (205 a) are uniformly distributed along the circumferential direction of the sealing column pressing ring (205), the central lines of the elliptical holes (205 a) in the length direction are all intersected at the center of the sealing column pressing ring (205), and the sealing column pressing ring (205) is tightly pressed by the sealing column (204) and fixedly connected to one side, close to the inner cavity mechanism (400), of the annular water channel (103 a);
the water channel baffle plate (206) is arranged in the annular water channel (103 a) and is fixedly connected with one side of the annular water channel (103 a) close to the inner cavity mechanism (400); the method comprises the steps of,
the heat conduction mechanism (300) comprises heat pipes (301), and a plurality of the heat pipes (301) are uniformly arranged along the circumference of the inner stator iron core (402 a);
the heat pipe (301) comprises an evaporation section (301 a), an insulation section (301 b) and a condensation section (301 c), wherein one end of the heat pipe (301) is the evaporation section (301 a), the other end of the heat pipe is the condensation section (301 c), and the insulation section (301 b) is arranged between the two sections;
the evaporation section (301 a) is arranged at the symmetrical center surface of a tooth slot of the inner stator core (402 a) and is tightly attached to windings wound on adjacent tooth parts in the tooth slot;
the evaporation section (301 a) is a flat pipe body, two parallel surfaces on the outer side of the evaporation section (301 a) are symmetrically arranged relative to the central surface of the tooth slot, the length direction of the evaporation section (301 a) is parallel to the axial direction of the inner stator iron core (402 a), the evaporation section (301 a) passes through an end winding on one side of the inner stator iron core (402 a) to reach an end winding on the other side, and the evaporation section (301 a) is positioned in the middle surface of an adjacent tooth winding and is tightly attached to the winding;
the condensing section (301 c) and the heat insulation section (301 b) are a section of circular pipe body; the method comprises the steps of,
the inner cavity mechanism (400) comprises an outer rotor assembly (401), an inner stator assembly (402) and an inner stator bracket (403), wherein the outer rotor assembly (401) is positioned at the inner side of the shell (102) with a gap between the outer rotor assembly and the inner stator assembly, the inner stator assembly (402) is coaxially positioned at the inner side of the outer rotor assembly (401) with a gap between the inner stator assembly and the inner stator assembly, the inner stator assembly (402) is fixedly connected to the outer side of the inner stator bracket (403), and the inner stator bracket (403) is fixedly connected to a cylindrical shell of which the rear end cover (103) is positioned in an inner cavity of the motor;
the inner stator assembly (402) comprises an inner stator core (402 a) and a coil winding (402 b), wherein the inner stator core (402 a) is fixed on an inner stator bracket (403), and the coil winding (402 b) is wound on the inner stator core (402 a).
2. The direct-cooled generator in a tank based on heat pipe cooling of claim 1, wherein: the rear end cover (103) is also provided with a water inlet (103 b) and a water outlet (103 c), and the water inlet (103 b) and the water outlet (103 c) are arranged on the outer side of the outer ring (103 a-2).
3. The direct-cooled generator in a tank based on heat pipe cooling according to claim 1 or 2, characterized in that: the outer rotor assembly (401) comprises a flywheel disc (401 a), an outer rotor support (401 b), an outer rotor iron core (401 c), outer rotor magnetic steel (401 d), a magnetic steel compression ring (401 e) and a rotary transformer (401 f), wherein the center position of the flywheel disc (401 a) is connected with an external engine (500), and the flywheel disc (401 a) is fixedly connected with one end of the outer rotor support (401 b);
the outer rotor iron core (401 c) is arranged on the inner side of the outer rotor bracket (401 b);
the outer rotor magnetic steel (401 d) is arranged on the inner side of the outer rotor iron core (401 c);
the magnetic steel compression ring (401 e) is fixedly connected with the other end of the outer rotor support (401 b) and is tightly pressed against the outer rotor magnetic steel (401 d);
the rotary variable piece (401 f) is arranged on the convex short shaft at the center of the flywheel disc (401 a).
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